msem-instigator

Germinate three times. (To germinate, put a +1/+1 counter on a creature or create a 1/1 green Saproling creature token.)

Flash
Lifelink
When this creature enters, counter target spell unless its controller pays {1} or 3 life.

Poisonous 2 (Whenever this creature deals combat damage to a player, that player gets two poison counters.)
Coil Remnant has deathtouch as long as an opponent is poisoned.

Choose two —
• Target player creates three 1/1 white Soldier creature tokens.
• Destroy target creature if its mana value is equal to or less than the number of creatures you control.
• Target opponent loses 1 life for each creature you control and you gain that much life.
• Put a +1/+1 counter on each creature target player controls.

Search your library for a basic land card, reveal it, put it into your hand, then shuffle. Scry 2.

Draw a card for each creature you control.
Agonize (You may cast this card from your graveyard by putting a -1/-1 counter on a creature you control in addition to paying its other costs. Then exile this card.)

Deathtouch
When Bitterheart Bokor leaves the battlefield, you may search your library for a Curse card, reveal it, put it into your hand, then shuffle.

Equipped creature gets +2/+1. As long as it's your turn, it has deathtouch and lifelink.
{4}, Unattach The Roseblade Reforged and return it to its owner's hand: Return target Knight or Soldier creature card from your graveyard to the battlefield tapped with a finality counter on it.
Equip {3}

Target creature you control gets +1/+1 until end of turn. It fights target creature you don't control.

Exile a nonland card from your graveyard: For each colored mana symbol in that card's mana cost, add one mana of that color. Activate only once each turn. (For example, if the card's mana cost is {3}{G}{G}{W}, you add {G}{G}{W}.)

[0]: Creatures you control gain haste until end of turn. Whenever a creature attacks this turn, put a loyalty counter on The Warrior Within.
[–1]: Exile the bottom two cards of your library. You may play one of them this turn.
[–6]: Untap each creature that attacked this turn. After this main phase, there is an additional combat phase.

Flying, first strike, vigilance, lifelink
When Bastion Valkyrie dies, create three Function tokens with “Choose a creature targeted by this spell. It gains flying, first strike, vigilance, and lifelink until end of turn.” (They're enchantments. As you cast an instant or sorcery spell, sacrifice any number of Functions to add their effects to that spell.)

Enchant land
Enchanted land has “{T}: Tap target creature.”

Whenever you create one or more tokens, scry 1.
{3}{U}, Sacrifice Pathshaper Mage: Aetherize target creature you control. Activate only as a sorcery. (To aetherize, create a token that's a copy of it, then exile that token.)

Alpha (You may have this creature enter with a +1/+1 counter on it. If you do, it becomes alpha and can only attack alone.)
Ruthless Predator can't be blocked by more than one creature.

Menace
If another Dwarf or Elf you control would deal damage to an opponent or permanent an opponent controls, it deals that much damage plus 1 instead.
{2}{R}: Create a 1/1 red Dwarf creature token.

Put a +1/+1 counter on each of up to X target creatures.
Augmented — If you've spent {W}{U}{B}{R}{G} to cast spells this turn, instead put three +1/+1 counters on each of those creatures. They gain trample until end of turn.

Draw two cards, then you may discard a card. If you do, target opponent reveals their hand. You choose a noncreature, nonland card from it. That player discards that card.

You may cast spells as though they had flash.
Whenever you cast a sorcery spell, each opponent loses 3 life unless they discard a card or sacrifice a nonland permanent.

Enchant creature
Enchanted creature has base power and toughness 1/1 and is a Frog in addition to its other types.
When enchanted creature deals damage to a player, sacrifice Belittle.

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)

Target creature you control gets +3/+1 and gains trample until end of turn.
Showcase {3}{R}{R} (Then if you cast this for its showcase cost, create a 1/1 red Bard creature token that can't block and exile this. Whenever it attacks, you may cast a free copy of this.)

Bleed {B/R} (You may cast this spell for its bleed cost if an opponent has lost life this turn.)
Left for Carrion deals 4 damage to target creature.

Poisonous 3 (Whenever this creature deals combat damage to a player, that player gets three poison counters.)
At the beginning of your upkeep, if an opponent is poisoned, you may have Mautakesh Strangler fight target creature you don't control.

Lifelink
{1}{B}, Sacrifice Bloodbond Ritualist: Look at the top three cards of your library. Put one of them into your hand and the rest into your graveyard.